Flue-stopper.



Patented luly I8, |899.

J. w. FLEMING.

FLUE STDPPER.

Application ied Deli 14, 1898.)

S y. fr. N M n A tions are brought together a circular opening- UNITED STATES PATENT' FFICE.

JOHN w. FLEMING, or NEW YORK, N. Y.

FLUE-STOPPER.

SrEcIrIcATIoN forming para of Letters Patent 119,629,244, aai-.ea may` 1s, 1899. Application med Deemteiit. 189s. sentito. 699,230. (No man.)

T0 all whom, may cocern:

Be itknown that I, JOHN W. FLEMING, of the city of New York, borough of Brooklyn,v in the county of Kings and State of NewYork, have invented a new and useful Improvement in Fluo-Stoppers, of which thefollowing isa full, clear, and exact description.

The object of my invention is to provide a stopper especially adapted to close ends of boiler-fines and so constructed that the stopper may be applied and the flue perfectly closed while the boiler is in use.

Another object of the invention is'to so oonstruct the stopper that it may be quickly and accurately applied.

The .invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure lis a horizontal longitudinal section taken on the line 1 l of Fig. 2. Fig. 2 is a transverse section on the line 2 2'of Fig. 1. Figs. 3 and A are detail perspective views of the sections of the body of the stopper, and Fig. 5 is a side elevation of the key employed Y in connection with the stopper. Y

The body of the stopper consists,preferably,` of two solid semispherical sectionsA and B. Each section is provided with a central longi tudinal groove lC. The grooves are arranged to register when the sections of the body are brought together and are'of the same formation. The side walls 10 of the grooves C are tapering or convergingatone end 11 of the body-section in which the groove is produced, and the back wall of the groove is inclined in a direction that renders the groove deepest at its contracted end. Thus when the body-sec-` 12 is formed at the outer end of the complete body, vwhile an Oval opening 13 is provided at the inner end of the body. i

The space formed by the registering grooves is adapted to receive a key D, having a cylindric outer part 14 and afwedge-shaped inner part 15, flattened at opposite sides, and the greater portion of the outer cylindric part 14:

is exteriorly threaded. 'Before the' body-sections A and B are brought together the wedgetion of Ythe wedge-shaped part of the key en# gaging with the back wall ofthe groove. Whenl the's'topper is to be placed in a iue E, thegwedge-shaped part 15 of the keyprojects beyond the inner end of the stopper sufficiently to permit the sections of said stopper to be brought close together, in which posi tion of the two sections the stopper may readily enter the tube.

When the stopper-body isl lproperly placed in the tube, the threaded part ofthe key eX tends beyond the adjacent end of the tube and through an opening in a cap F, the said Vcap comprising a plug portion 16 and flange l17. The plug portion of the cap is adapted to engage with the interior of the tube near the end, whilel the flange extends laterally beyond and is adapted to contact with the tube at its end, as shown in Fig. 1. The sections of the body are expanded within the tube and the cap is held as a stopper at' the end of the tube by adjusting a nut 18 on the threaded end of the key to a firm bearing against the cap or against awasher 19, intervening the cap and the nut. The inner surface of the flange 17 is annularly grooved, as at-l''v, to receive the end of the ue, said groove being concave, so that the cap may be forced tightly against the inner edge of the flue end when pressure is applied to the nut 18. l

The sections of the stopper body when brought together are prevented from havingV end movement by abutment-pins 2O 21 at the inner ends of the stopper-sections, each pin bearing against the adjacent end of the stopper-section toward which itprojects, as shown in Fig. 2.

Having thus described my invention, `I claim as new and desire to secure by Letters Patent- 1. A fluestopper,couiprising abody formed of longitudinal sections,a' key having a wedge lshaped portion adapted to be located be- ,tween the body-sections, a cap through which a portion of the key passes, and a device grooves in the body-sections, a Cap through which the threaded portion of the key passes, and means for expanding the body-sections through the mediun of the key, and a lool;- ing device for the eap, as described.

3. In a flue-stopper, the combination7 With a body constructed in two longitudinal se@ tions, said sections being provided with registering tapering grooves, and means for holding the sections of the 4body against end- Inovement, oi' a cap, a key having a threaded part that passes through the eap and a Wedge part adapted to enter the registering grooves in the body-section, and a nut located upon the threaded endof the said key, being adapted to bear against the outer portion of the said cap, for the purpose set forth.

4. A flue-stopper comprising a body formed of two longitudinal sections, a cap consisting of a body adapted to enter a flue, and a flange having a peripheral groove adaptedto reeeive the end portion of a fine, a key having a Wedge-shaped portion adapted to be located between the end setions and expand the same, the said key being provided with a threaded portion arranged to pass through the eap,and a lock-nut carried by the threaded portion of the key and adapted to bear against 4 the said cap, for the purpose set forth.

JOHN W. FLEMING.

Witnesses:

J. FRED. AUKER, JOHN E. GUNN. 

